When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...

Service Interruption

On Monday, 11 July from 3:00 p.m. through Wednesday, 13 July until 5:00 p.m. (USA Mountain Time), NSIDC data distribution, services, and Web site will be unavailable to accommodate a major upgrade to our data center. We apologize for any inconvenience this may cause you.
Need to talk to us? You can always contact our friendly User Services Office at nsidc@nsidc.org or + 1 303.492.6199.

File names include location names.
Reflectance files include ".rfl" in the file name.
Radiance files include ".img" in the file name.
Grain size files include ".grnsz" in the file name.
Snow cover files include ".snow" in the file name.

File and Directory Structure

Data are available on the FTP site in the ftp://sidads.colorado.edu/pub/DATASETS/CLP/data/airborne/nsidc0154_aviris/ directory. Within this directory, there are three folders and a ReadMe file. One folder contains data for the Intensive
Observation Period 4 (IOP-4), one folder contains data for reflectances,
and one folder contains data for radiances. Within the IOP folder, data files are
organized by study area location.

File Naming Convention

The following codes are used in filenames:

File names include location names.
Reflectance files include ".rfl" in the file name.
Radiance files include ".img" in the file name.
Grain size files include ".grnsz" in the file name.
Snow cover files include ".snow" in the file name.
Vegitation cover files include ".veg" in the file name.

Each file is named by its location and then a date of the form yymmdd.